大约有 45,000 项符合查询结果（耗时：0.0930秒） [XML]
Two single-column indexes vs one two-column index in MySQL?
I'm faced with the following and I'm not sure what's best practice.
4 Answers
4
...
Format a date using the new date time API
...e. Use a LocalDateTime instead, assuming you want to represent both a date and time.
share
|
improve this answer
|
follow
|
...
In JavaScript, is returning out of a switch statement considered a better practice than using break?
... I wasn't using your example, just the technique. Look at my question and click the link to my jsFiddle to see what I'm talking about.
– Code Maverick
May 24 '11 at 19:19
...
How can I count the number of matches for a regex?
...r Java 9+
long matches = matcher.results().count();
Solution for Java 8 and older
You'll have to do the following. (Starting from Java 9, there is a nicer solution)
int count = 0;
while (matcher.find())
count++;
Btw, matcher.groupCount() is something completely different.
Complete exampl...
Json.net serialize/deserialize derived types?
...ewtonsoft JSON.NET
Be careful, though. Using anything other than TypeNameHandling = TypeNameHandling.None could open yourself up to a security vulnerability.
share
|
improve this answer
|
...
How can I install from a git subdirectory with pip?
...
There is a pull request regarding this feature, and it seems to have been merged to develop branch a month ago. The syntax is the following:
pip install -e git+https://git.repo/some_repo.git#egg=version_subpkg&subdirectory=repo # install a python package from a repo s...
Get current batchfile directory
Firstly, I saw this topic but I couldn't understand that.
4 Answers
4
...
How can I initialize an ArrayList with all zeroes in Java?
...mber of elements it can hold before it needs to resize its internal array (and has nothing to do with the initial number of elements in the list).
To initialize an list with 60 zeros you do:
List<Integer> list = new ArrayList<Integer>(Collections.nCopies(60, 0));
If you want to cre...
Format number to 2 decimal places
...
You want to use the TRUNCATE command.
https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_truncate
share
|
improve this answer
...
How to escape a JSON string to have it in a URL?
...forum/?fromgroups=#!topic/nodejs/ivdZuGCF86Q
shows benchmarks for encoding and parsing.
Note: After testing, it looks like jsurl.js library uses ECMAScript 5 functions such as Object.keys, Array.map, and Array.filter. Therefore, it will only work on modern browsers (no ie 8 and under). However, are...